The MCAT is global in scope. International MCAT CBT sites have separate exam schedules. Be sure to research the specific location at which you're planning to take the MCAT. Check out the list of MCAT testing sites, outside of the U.S., where you can take the MCAT.

Online pre-registration is mandatory and a "walk-in MCAT" is not permissible

Ok, if you feel like you now know enough, get right to it and register for the MCAT and just hope that you're early enough to secure a seat in your testing location of choice and on your preferred date

WHAT else should I be aware of?

Try to take the MCAT in January, April, or May for the purpose of knowing your score before you apply to med schools. You should already be preparing for your applications before you even take the MCAT. Sitting for the exam earlier in the year also allows you to tweak your plan for re-taking the MCAT (if this pertains to you).

Enter your name in the online registration system precisely as it appears on the ID you bring to the test center

Be sure that your e-mail account does not recognize AAMC or Prometric messages as spam

Check that all fees for your MCAT have been paid in full before exam day